I've a mapView on which I managed to get an overlay onLongPress with the help of GestureListener. What I actually want is, I want to add markers (with same icon) one by one. Like I want to mark different positions on map (not all at once). Any help with this would be great as am newbie with MapView and Overlays.
Use ItemizedOverlay class to add drawable on specific longitudes and latitudes.
In your MapActivity write
GeoPoint your_point = (Provide geopoint information here);
Drawable drawable =
this.getResources().getDrawable(R.drawable.your_point_image);
HelloItemizedOverlay itemizedoverlay = new HelloItemizedOverlay(
drawable, MapsActivity.this, mapView);
GeoPoint point = new GeoPoint((int) (your_point.getLat() * 1E6),
(int) (your_point.getLon() * 1E6));
OverlayItem overlayitem1 = new OverlayItem(your_point);
itemizedoverlay.addOverlay(overlayitem1);
mapView.getOverlays().add(itemizedoverlay);
Where
HelloItemizedOverlay extends ItemizedOverlay{
public HelloItemizedOverlay(Drawable defaultMarker, Activity context,
MapView mapView) {
super(boundCenterBottom(defaultMarker));
mContext = context;
this.mapView = mapView;
}
}
I did it this way and it works.
Related
In my application I have a map-activity which uses OSMDroid. I've managed to manually add markers with Overlay to display different locations but I want to implement a function where a marker will be created when you either double-tap or longpress.
I've scavenged the web for some kind of good explanation since I've troubles understanding the documentation of OSMDroid and their bonuspack.
Here is my relevant code:
public class Map extends Activity{
MapView mapView;
MapController mapController;
ArrayList<OverlayItem> overlayItemArray;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.map);
mapView = (MapView) this.findViewById(R.id.mapView);
mapView.setBuiltInZoomControls(true);
mapView.setMultiTouchControls(true);
mapController = (MapController) mapView.getController();
mapController.setZoom(14);
GeoPoint startPoint = new GeoPoint(58.4109, 15.6216);
mapController.setCenter(startPoint);
// Create an ArrayList with overlays to display objects on map
overlayItemArray = new ArrayList<OverlayItem>();
// Create som init objects
OverlayItem linkopingItem = new OverlayItem("Linkoping", "Sweden",
new GeoPoint(58.4109, 15.6216));
OverlayItem stockholmItem = new OverlayItem("Stockholm", "Sweden",
new GeoPoint(59.3073348, 18.0747967));
// Add the init objects to the ArrayList overlayItemArray
overlayItemArray.add(linkopingItem);
overlayItemArray.add(stockholmItem);
// Add the Array to the IconOverlay
ItemizedIconOverlay<OverlayItem> itemizedIconOverlay = new ItemizedIconOverlay<OverlayItem>(this, overlayItemArray, null);
// Add the overlay to the MapView
mapView.getOverlays().add(itemizedIconOverlay);
}
I'm trying to develop a layout that shows a Google Map with a route drawn on a Overlay layer associated with this map. I want this mapView to be a small static map that shows, as a thumbnail, the main route the user followed, and then if the user clicks on it, an intent takes you to a different activity displaying the map in full screen with the route and all the zoom functionalities.
The thing is that although I override the onTap method of the Overlay setting there the intent to the new activity, it only works if I set the MapView as setEnabled(true), but if I do so, then the thumbnail map can be dragged and moved by the user.
I'm sorry if it is not clear enough, but I don't know how to explain it better.
Thanks in advance
This is my customized class which extends Overlay and overrides the onTap method:
class MapOverlay extends Overlay {
#Override
public boolean onTap(GeoPoint p, MapView mapView) {
Intent i = new Intent(getApplicationContext(),
RouteMapActivity.class);
startActivity(i);
return false;
};
And this is my onCreate method:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.detailrun_activity);
map = (MapView) findViewById(R.id.mvMain);
map.setEnabled(true);
map.setClickable(true);
MapOverlay mapOverlay = new MapOverlay();
List<Overlay> listOfOverlays = map.getOverlays();
projection = map.getProjection();
listOfOverlays.clear();
listOfOverlays.add(mapOverlay);
double lat = 28.063119 * 1E6, longi = -82.41128 * 1E6;
GeoPoint point = new GeoPoint((int) lat, (int) longi);
MapController myMapController = map.getController();
myMapController.setCenter(point);
}
For now I'm only drawing a straight line between two GeoPoints, and I don't get any logcat errors.
The map with the route is indeed drawn, and the overrided onTap method works, but it seems it only recognizes the tap if my mapView is defined as enabled and clickable, but if I do so, then the user can also move and drag the map as long as he holds pressing the screen.
you can get static google map image as per your location by this link. that you can display in imageview and click on that you can target new activity which have MapView.. i think it may be a good option for you.
I was following this tutorial to create something a little diffrent, this tutorial showed how the overlay works with predefined items inserted to it, but what if i want to dynamiclly add items to it? then I must start with an empty overlay:
Instead of :
MapView mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
List<Overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.androidmarker);
ItemOverlay itemizedoverlay = new ItemOverlay(drawable, this);
GeoPoint point = new GeoPoint(19240000,-99120000);
OverlayItem overlayitem = new OverlayItem(point, "Hola, Mundo!", "I'm in Mexico City!");
itemizedoverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedoverlay);
which works just like as expected in the tutorial, I need to put this:
MapView mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
List<Overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.androidmarker);
ItemOverlay itemizedoverlay = new ItemOverlay(drawable, this);
mapOverlays.add(itemizedoverlay);
which ommits the initializition of the overlay with an item.
this approach leads to the map getting stuck, and after few taps my app gets kicked out due to null exception.
1.is this expected behavior? it seems like a bug to me...
2.what do i do in order to acheive the expected behavior?(in which i can start with an empty overlay and add items to it dynamically)
And as for what i want to acheive, which is to not initiate the overlay with and item but to use addOverlay dynamically, this way i can
As far as I understand, under ItemOverlay you mean ItemizedOverlay. If so, you are on the right track. ItemizedOverlay is a container of map items, so every time you add/delete items from ItemizedOverlay you need to set last focused item to -1 and call populate() method to notify mapview about content change.
Just remember that you need to make changes in ItemizedOverlay content in a UI thread context ;)
There is also undocumented trick here. You need to set last focused index to -1 and do populate() even when you don't have items (so you need to do this on initialization stage)
So your code should look like:
MapView mapView = (MapView) findViewById(R.id.mapview);
mapView.setBuiltInZoomControls(true);
List<Overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.androidmarker);
ItemOverlay itemizedoverlay = new ItemOverlay(drawable, this);
mapOverlays.add(itemizedoverlay);
setLastFocusedIndex(-1); //reset initial position
populate(); //notify about our content
//now try to add new item
GeoPoint point = new GeoPoint(19240000,-99120000);
OverlayItem overlayitem = new OverlayItem(point, "Hola, Mundo!", "I'm in Mexico City!");
itemizedoverlay.addOverlay(overlayitem);
setLastFocusedIndex(-1); //reset initial position
populate(); //notify about our content
i am trying to make the application display my location on google maps with a geapoint, but it always opens the same place when opening the application on my phone, which is the value i added in the code as an initial value for the testing on the compiler.
how can i make it display my location(make it change the Latitude and longitude according to my place)?
here is the code:
public class AndroidGoogleMapsActivity extends MapActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
// Displaying Zooming controls
MapView mapView = (MapView) findViewById(R.id.mapView);
mapView.setBuiltInZoomControls(true);
/**
* Changing Map Type
* */
mapView.setSatellite(true); // Satellite View
// mapView.setStreetView(true); // Street View
mapView.setTraffic(true); // Traffic view
/**
* showing location by Latitude and Longitude
* */
MapController mc = mapView.getController();
double lat = Double.parseDouble("31.894178");
double lon = Double.parseDouble("35.872694");
GeoPoint geoPoint = new GeoPoint((int)(lat * 1E6), (int)(lon * 1E6));
mc.animateTo(geoPoint);
mc.setZoom(15);
mapView.invalidate();
/**
* Placing Marker
* */
List<Overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.mark_red);
AddItemizedOverlay itemizedOverlay =
new AddItemizedOverlay(drawable, this);
OverlayItem overlayitem = new OverlayItem(geoPoint, "Hello", "Sample Overlay item");
itemizedOverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedOverlay);
}
#Override
protected boolean isRouteDisplayed() {
return false;
}
}
You're never calling the actual GPS which is why it's reverting to the ones you programmed in. This is pretty well documented in other places, but here's a good place to start: http://about-android.blogspot.com/2010/04/find-current-location-in-android-gps.html
See Location detection ; that's the easy way to do it afaik, and it worked for me. Cheers!
i have a mapview and overlay items which when tap on shows popuo with text. what I want is when user taps on map outside of these overlay items or popup hide the popup if its currently visible.
The only way to do it (as I know), is adding new overlay to your map, witch serves as the popup. When you tap outside of the overlay, just remove it from overlay list.
This means you have to draw and handle events for your popup by yourself.
Ive been trying to acheive the same, this is exactly what i want :-
http://proxy.latest.xuemath.appspot.com/img?s=aR.1f.1be6ifej.2ec/_Fbk8IlxNQXM/S-ruq97dRWI/AAAAAAAAELY/s-o3onSReiU/s400/kml_google_maps_v3.bmp
i have implemented googleMapView with overlays, i have one issue i want to show a popup when clicked on each overlay, and when i click on another overlay the previous popus should disappear and new one should appear at the clicked location(ie projection points). And popup shouldnt appear when i click anywhere else on screen.Im using onTap event to record onclick. (map_overlay) is the layout that i want to show when someone click a projection point on the map. The code is below and map_overlay.xml could be any file.
Class: ItemizedOverlay:-
public boolean onTap(GeoPoint p, MapView mapView) {
LayoutInflater inflater = (LayoutInflater)cContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
LayoutParams lp = new MapView.LayoutParams(ViewGroup.LayoutParams.FILL_PARENT, ViewGroup.LayoutParams.FILL_PARENT, p, LayoutParams.WRAP_CONTENT);
LinearLayout view = (LinearLayout)inflater.inflate(R.layout.map_overlay, null);
mapView.removeView(view);
mapView.invalidate();
mapView.addView(view,lp);
mapView.invalidate();
return true;
}
Below is the Main class in which im displaying projection points which is working fine and im calling I have implemented the onTap event in another class as shown above:
public class MapView extends MapActivity{
private ArrayList overlayItem ;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.large_mapview);
mapView = (MapView) findViewById(R.id.mapview);
// mapView.setBuiltInZoomControls(true);
List<Overlay> mapOverlays = mapView.getOverlays();
Drawable drawable = this.getResources().getDrawable(R.drawable.mappointer2);
ItemizedOverlay itemizedoverlay = new ItemizedOverlay(drawable,this);
OverlayItem overlayitem;
GeoPoint point;
double lat;
double lng;
for (int i = 0; i < overlayItem.size(); i++) {
lat = Double.parseDouble(overlayItem.get(i).getLatitude());
lng = Double.parseDouble(overlayItem.get(i).getLongitude());
point = new GeoPoint((int) (lat * 1E6),(int) (lng * 1E6));
overlayitem = new OverlayItem(point, i+"".toString(), overlayItem.get(i).getDetails().toString());
itemizedoverlay.addOverlay(overlayitem);
mapOverlays.add(itemizedoverlay);
}
mapView.invalidate();
}
}